6638426 has 8 divisors (see below), whose sum is σ = 10189344. Its totient is φ = 3241980.

The previous prime is 6638407. The next prime is 6638459. The reversal of 6638426 is 6248366.

6638426 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38510 + ... + 38681.

It is an arithmetic number, because the mean of its divisors is an integer number (1273668).

Almost surely, 2^6638426 is an apocalyptic number.

6638426 is a deficient number, since it is larger than the sum of its proper divisors (3550918).

6638426 is a wasteful number, since it uses less digits than its factorization.

6638426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77236.

The product of its digits is 41472, while the sum is 35.

The square root of 6638426 is about 2576.5143120115. The cubic root of 6638426 is about 187.9410747878.

The spelling of 6638426 in words is "six million, six hundred thirty-eight thousand, four hundred twenty-six".